<script setup lang="ts">
import { createRoleUserAPI, getTreeListAPI } from '@/apis/system';
import { loginAPI } from '@/apis/user';
import type { RoleData, RoleParams } from '@/types/system';
import { ElMessage, type FormInstance, type FormRules } from 'element-plus';
import type { TreeInstance } from 'element-plus/lib/components/index.js';
import { ref } from 'vue';
import { useRouter } from 'vue-router';
  
  // 表单数据
  const roleForm = ref<RoleParams>({
    roleName:'',
    remark:'',
    perms:[]
  })
  const activeStep = ref(1)
  const prevStep = () =>{
    activeStep.value --
  }
  const nextStep = async() =>{
   
    try{

      if(activeStep.value ===1) {
      // 1.进入表单校验
      await roleFormRef.value?.validate()
      // 校验没问题，进入下一步
      activeStep.value ++
      }else if(activeStep.value ===2){
       // 2.校验表单 树形节点选中
      // 先清空输入，避免push累加
      roleForm.value.perms = []
      // 获取选中的节点
      treeRefs.value.forEach(tree =>{
        
        const res = tree.getCheckedKeys() as number[]
        // 追加到数组值
        roleForm.value.perms.push(res)
      })
      // 
      if(roleForm.value.perms.flat().length === 0){
        ElMessage.error('请至少勾选一项权限')
      }else{
        // 选中没有问题，进入下一步(表单3)
        activeStep.value++
        // 进入表单3后，把选中的权限，同步到被禁用的树形组件
        disabledTreeRefs.value.forEach((tree,index)=>{
          tree.setCheckedKeys(roleForm.value.perms[index])
        })
      }
      }
    }catch{

    }
  }   
  const treeList = ref<RoleData[]>([]) // 权限树形列表
// 获取功能权限列表
  const getTreeList = async () => {
  const res = await getTreeListAPI()
  treeList.value = res.data
}
getTreeList()
  // 可选的树形组件(表单2)
const treeRefs = ref<TreeInstance[]>([])

// 被禁用的树形组件(表单3)
const disabledTreeRefs = ref<TreeInstance[]>([])
  
  //自定义校验规则
  const roleFormRef = ref<FormInstance>()
  const roleRules = ref<FormRules<RoleParams>>({
    roleName:[
      { required:true, message:'请输入角色名称' ,trigger:'blur'},
      { min:2,max:20 ,message:'长度在2-20个字符' ,trigger:'blur'},
    ],
    remark:[
      {required:true, message:'请输入角色描述' ,trigger:'blur'}
    ]
  }) 

  const router = useRouter()
  // 确认添加
  const onSubmit = async ()=>{
    await createRoleUserAPI(roleForm.value)
    // 轻提示
    ElMessage.success('添加成功')
    // 返回上一页
    router.back()
  }
</script>

<template>
  <div class="add-role">
    <header class="add-header">
      <el-page-header content="添加角色" @back="$router.back()" />
    </header>
    <main class="add-main">
  
      <div class="step-container">
        <el-steps direction="vertical" :active="activeStep">
          {{ activeStep}}
          <el-step title="角色信息" />
          <el-step title="权限信息"/>
          <el-step title="检查并完成" />  
        </el-steps>
      </div>
      <div class="form-container"  v-show="activeStep===1">
        <div class="title">角色信息</div>
        <div class="form">
          <el-form ref="roleFormRef" class="form-box" :model="roleForm" :rules="roleRules">
            <el-form-item label="角色名称：" prop="roleName">
              <el-input v-model="roleForm.roleName"></el-input>
            </el-form-item> 
            <el-form-item label="角色描述：" prop="rolemark">
              <el-input v-model="roleForm.remark" type="textarea"></el-input>
            </el-form-item> 
            
          </el-form>
        </div>
      </div>
      <div class="form-container"  v-show="activeStep===2" >
        <div class="title">权限配置</div>
        <div class="form">
    <div class="tree-wrapper">
      <div v-for="item in treeList" :key="item.id" class="tree-item">
        <div class="tree-title">{{ item.title }}</div>
        <el-tree 
          ref="treeRefs" 
          :data="item.children" 
          show-checkbox 
          default-expand-all 
          node-key="id"
          highlight-current 
          :props="{ label: 'title' }" />
      </div>
    </div>
      </div>
      </div>
      <div class="form-container" v-show="activeStep===3">
        <div class="title">检查并完成</div>
        <div class="form">
          <div class="info">
            <div class="form-item">角色名称：{{ roleForm.roleName }}</div>
            <div class="form-item">角色描述：{{ roleForm.remark }}</div>
            <div class="form-item">角色权限：</div>
            <div class="tree-wrapper">
              <div v-for="(item, index) in treeList" :key="item.id" class="tree-item">
                <div class="tree-title">{{ item.title }}</div>
                <el-tree
                  :data="item.children"
                  show-checkbox
                  default-expand-all
                  node-key="id"
                  :props="{ label: 'title', disabled: () => true }"
                  ref="disabledTreeRefs"
                />
              </div>
            </div>
          </div>
        </div>
      </div>
    </main>
    <footer class="add-footer">
      <div class="btn-container">
        <el-button  @click="prevStep()" v-if="activeStep >1 ">上一步</el-button>
        <el-button type="primary" @click="nextStep()" v-if="activeStep < 3">下一步</el-button>
        <el-button type="primary"  @click="onSubmit()" v-if="activeStep === 3">确定添加</el-button>
        {{ roleForm }}
      </div>
    </footer>
  </div>
</template>


<style scoped lang="scss">
.add-role {
  background-color: #f4f6f8;
  height: 100vh;

  .add-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 64px;
    line-height: 64px;
    font-size: 16px;
    font-weight: bold;
    background-color: #fff;

    .left {
      span {
        margin-right: 4px;
      }

      .arrow {
        cursor: pointer;
      }
    }

    .right {
      text-align: right;
    }
  }

  .add-main {
    position: fixed;
    top: 64px;
    bottom: 88px;
    width: 100%;
    overflow-y: auto;
    background: #f4f6f8;
    padding: 20px 30px;
    display: flex;

    .step-container {
      height: 400px;
      width: 200px;
    }

    .form-container {
      flex: 1;
      background-color: #fff;
      overflow-y: auto;

      .title {
        height: 60px;
        line-height: 60px;
        padding-left: 20px;
      }

      .form {
        margin-bottom: 20px;
        padding: 20px 65px 24px;

        .el-form {
          display: flex;
          flex-wrap: wrap;
        }

        .info {
          font-size: 14px;
          color: #666;

          .form-item {
            margin-bottom: 20px;
          }
        }
      }

      .form-box {
        width: 600px;
        display: flex;
        flex-direction: column;
      }
    }
  }

  .add-footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    padding: 24px 50px;
    color: #000000d9;
    font-size: 14px;
    background: #fff;
    text-align: center;
    z-index: 10001;
  }

  .tree-wrapper {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;

    .tree-item {
      flex: 1;
      padding: 0px 4px;
      text-align: center;

      .tree-title {
        background: #f5f7fa;
        text-align: center;
        padding: 10px 0;
        margin-bottom: 12px;
      }
    }
  }
}
</style>